From: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
[ Upstream commit 831463667b5f4f1e5bce9c3b94e9e794d2bc8923 ]
As mipi_dsi_driver_register could return error if fails,
it should be better to check the return value and return error
if fails.
Moreover, if i2c_add_driver fails, mipi_dsi_driver_register
should be reverted.
Fixes: 1e4d58cd7f88 ("drm/bridge: adv7533: Create a MIPI DSI device")
Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220602103401.2980938-1-jiasheng@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index e2f84e2d5d3c..62ef603627b7 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1302,10 +1302,21 @@ static struct i2c_driver adv7511_driver = {
static int __init adv7511_init(void)
{
- if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
- mipi_dsi_driver_register(&adv7533_dsi_driver);
+ int ret;
+
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
+ ret = mipi_dsi_driver_register(&adv7533_dsi_driver);
+ if (ret)
+ return ret;
+ }
- return i2c_add_driver(&adv7511_driver);
+ ret = i2c_add_driver(&adv7511_driver);
+ if (ret) {
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_unregister(&adv7533_dsi_driver);
+ }
+
+ return ret;
}
module_init(adv7511_init);
--
2.35.1
